Bose AV28 User Manual

1
PROPRIETARY INFORMATION
THIS DOCUMENT CONTAINS PROPRIETARY INFORMATION OF
BOSE CORPORATION WHICH IS BEING FURNISHED ONLY FOR
THE PURPOSE OF SERVICING THE IDENTIFIED BOSE PRODUCT
BY AN AUTHORIZED SERVICE CENTER OR OWNER OF THE
BOSE PRODUCT, AND SHALL NOT BE REPRODUCED OR USED
FOR ANY OTHER PURPOSE.
Software Update Information
The software in the AV28 Media center can be updated using a software update CD available from
Bose
®
service. Refer to procedure 2 on page 70, Console-Key Special Function Features, to
determine the software version of the unit. Contact Bose Service or refer to the Bose service
extranet site for information regarding the latest software revision; click on Lifestyle
®
music centers
and then AV28 media center. http://serviceops.bose.com
Contents
Safety Information ............................................................................................................................2
Electrostatic Discharge Sensitive (ESDS) Device Handling .........................................................2
Specifications ................................................................................................................................ 3-5
Theory of Operation ................................................................................................................... 6-28
Disassembly/Assembly ............................................................................................................ 29-30
Setting-up a Computer to Issue TAP Commands ........................................................................31
Issuing TAP Commands to the AV28 media center ..................................................................... 32
General Test Procedure Notes .......................................................................................................32
Functional/Performance Verification Tests ............................................................................. 33-34
Adjustment/Performance Verification Procedures ................................................................ 35-37
Figure 1. AM Test Setup ....................................................................................................................35
Figure 2. Tap Test Cable Part Number 264565 .................................................................................. 38
Part List Notes ................................................................................................................................. 38
Main Part List...................................................................................................................................39
Figure 3. Exploded View .................................................................................................................... 40
Main PCB 260318-0 Electrical Part List ................................................................................... 41-55
Tuner PCB 260322-1 Electrical Part List ................................................................................. 56-60
Head Unit Packaging Part List ....................................................................................................... 61
Figure 4. Console Packaging ............................................................................................................61
Figure 6. Laser Current Measurement Point ...................................................................................... 62
Figure 5. DVD Player Rear Panel ......................................................................................................62
Laser Current Measurement ..........................................................................................................62
Integrated Circuit Diagrams ..................................................................................................... 63-67
Changing House Codes .................................................................................................................68
Figure 7. House Code Settings .........................................................................................................68
Zone 2 Operation ............................................................................................................................69
Figure 8. Zone 2 Remote Control Switch Setting .............................................................................. 69
Console-Key Special Function Features ...................................................................................... 70

Bose AV28 Specifications

General

Type	DVD player
Progressive Scan	Yes
Remote Control	Yes
Upscaling	No
Playable Media Format	DVD, CD, MP3
Video Output	Component, Composite, S-Video
Audio Output	Digital Optical, Digital Coaxial

Summary

Safety Information

Electrostatic Discharge Sensitive (ESDS) Device Handling

Precautions for handling ESD sensitive devices to prevent damage during repair or replacement.

Specifications

Theory of Operation

Overview, PCBs, and Power Supply

General overview, lists PCBs, and details power supply architecture and block diagram.

Control Electronics

Details the main processor (U1), memory, and control circuitry.

Audio, Video, and Tuner Electronics

Disassembly/Assembly

Setting-up a Computer to Issue TAP Commands

Hyperterminal Configuration for TAP Commands

Step-by-step guide for configuring Hyperterminal for issuing TAP commands.

Issuing TAP Commands to the AV28 media center

TAP Test Cable Connection and Verification

Connects the test cable and verifies media center communication in TAP mode.

Functional/Performance Verification Tests

AM/FM Tuner Tests

Adjustment/Performance Verification Procedures

AM Tuner Adjustments

Procedures for adjusting AM tuner sensitivity, stop levels, and slug tuning.

FM Tuner Adjustments

Procedures for adjusting FM tuner IF offset, distortion, sensitivity, and stop levels.

FM Stereo Threshold and TV Detector Verification

Laser Current Measurement

Measurement Procedure and Tolerances

Integrated Circuit Diagrams

U1 Decoder, U2 FLASH, U3 SDRAM ICs

Changing House Codes

House Code Setting Procedure

Step-by-step guide for changing the media center's house code using the remote.

Zone 2 Operation

Setting Up a Second Listening Zone

Instructions for setting up and controlling a second listening zone using remote switches.

Console-Key Special Function Features

House Code/Software Revision Access

Video Test Patterns and Self Tests